From what I understand, it could possibly be any day now. I'd definitely check while I was down there if I were you. My friend lives down there... Between Sprint LTE and Google Fiber, I'm more than a little jealous.
I was in a corporate store today and they said it has been on for a handful of minutes here and there the past couple of weeks but said it is slated to be on on June 1st. Take that as you want. I am can't wait.